One big cost, at least for some designs, is the sorbent material, which cannot be recycled indefinitely.

对某些方案来说，一个巨大的花费来自于不能循环利用的吸收剂。

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Several designs are being developed, but they involve variations on the same theme. In each case air is brought into contact with a “sorbent” material, which binds chemically with the carbon dioxide.

现在已经开发出的方案虽然各不相同，但却都是基于同一个思想，这就是将空气通过有“吸附剂”的材料，而这种材料的化学性质使它能与二氧化碳结合。

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The purified MWCNTs are found to be a suitable packing material for gas chromatography and a sorbent in trapping volatile organic compounds from air.

它可以作为气相 色谱固定相和吸附挥发性有机物的吸附剂。

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